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3 years ago

The line of symmetry of the parabola whose equation is y = ax2 - 4x + 3 is x = -2. What is the value of "a"? -2 -1 -1/2

Mathematics

1 answer:

iren2701 [21]3 years ago

6 0

Answer:

a = -1.

Step-by-step explanation:

y = ax^2 - 4x + 3

Convert to vertex form:-

= a(x^2 - 4/a) + 3

= a [ (x - 2/a)^2 - 4/a^2 ] + 3

From this we see that the line of symmetry is y = 2/a so

2/a = -2

-2a = 2

a = -1.

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